A dual-polarized omni-directional ceiling antenna

Abstract

The utility model provides a kind of bipolar omnidirectional ceiling antenna, including reflector, first radiator and second radiator being arranged above reflector and coaxial cable being connected to first radiator and second radiator respectively from below reflector and passing through reflector;The first radiator is the vertical polarized linear structure radiator of the wire group of multiple intercrossing;The second radiator has several horizontal polarized radiating elements, and the horizontal polarized radiating element of adjacent interval is same.The vertical polarized radiator of the utility model is linear structure, and the horizontal component of its electric field is reduced, and the isolation between first radiator and second radiator can be obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to a dual-polarized omnidirectional ceiling antenna. Background Technology

[0002] Omnidirectional ceiling antennas are mainly used for indoor signal coverage, such as in conference rooms, hotels, office buildings, cinemas, and residential buildings, to enhance mobile signal coverage. However, the vertically polarized and horizontally polarized radiated signals of dual-polarized omnidirectional ceiling antennas are prone to interference. Therefore, improving the isolation of dual-polarized omnidirectional ceiling antennas is a problem that needs to be solved. Utility Model Content

[0003] The purpose of this invention is to provide a dual-polarized omnidirectional ceiling antenna with high isolation.

[0004] This utility model proposes a dual-polarized omnidirectional ceiling antenna, including a reflector, a first radiator and a second radiator disposed above the reflector, and a coaxial cable passing through the reflector from below and connecting to the first radiator and the second radiator respectively; the first radiator is a vertically polarized linear structure radiator composed of multiple intersecting wires; the second radiator has several horizontally polarized radiating elements, and adjacent horizontally polarized radiating elements are spaced at the same interval.

[0005] In one embodiment, the first radiator includes an open-circuit conductor and a ground conductor, with adjacent open-circuit conductors having the same spacing and adjacent ground conductors having the same spacing.

[0006] In one embodiment, the reflector is circular, and the intersection of the linear structure is collinear with the center point of the reflector; the coaxial cable includes a first cable and a second cable arranged in parallel; the first cable passes through the center point of the reflector and connects to the intersection of the linear structure.

[0007] In one embodiment, the second radiator includes a plurality of dielectric plates perpendicular to the reflector; the horizontally polarized radiating element is disposed on a surface of the double-sided dielectric plate parallel to the reflector. The high-frequency radiating plate is disposed on the side of the double-sided dielectric plate facing the outer periphery of the reflector; the feed line is connected to the high-frequency radiating plate.

[0008] In one embodiment, the system further includes a feed line and a power supply unit disposed on the dielectric substrate, the power supply unit being connected to a horizontally polarized radiating element; one end of the feed line is connected to a second cable, and the other end is connected to a plurality of power supply units respectively.

[0009] In one embodiment, the power supply element is disposed on one side of the dielectric plate perpendicular to the reflector.

[0010] In one embodiment, the number of open-circuit wires is the same as the number of grounding wires; the open-circuit wires and grounding wires are symmetrically arranged at their intersections.

[0011] In one embodiment, the number of horizontally polarized radiators is equal to the number of open-circuit conductors; the second radiator is a high-frequency oscillator; and they are respectively disposed on the outer periphery of the first reflector.

[0012] In one embodiment, the wire is a copper conductor; the reflector is a double-sided dielectric plate.

[0013] In one embodiment, the coaxial cable is model RFG58.

[0014] This invention comprises a vertically polarized first radiator and a horizontally polarized second radiator; the vertically polarized first radiator has a linear structure, and its horizontal component of electric field is reduced, which can significantly improve the isolation between the first radiator and the second radiator. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a dual-polarized omnidirectional ceiling antenna according to the present invention; Figure 2 for Figure 1 A schematic diagram of the structure of a dual-polarized omnidirectional ceiling antenna from another angle; Figure 3 for Figure 1 The diagram shows a top view of a dual-polarized omnidirectional ceiling antenna. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0019] Please refer to Figure 1 This utility model provides a dual-polarized omnidirectional ceiling antenna 100, including a reflector 1, a first radiator 10 and a second radiator 20 disposed above the reflector 1, and a coaxial cable 50 passing through the reflector 1 from below and connecting to the first radiator 10 and the second radiator 20 respectively.

[0020] In this embodiment, the first radiator 10 is a vertically polarized linear structure radiator composed of multiple intersecting wires. The second radiator 20 has several horizontally polarized radiating elements 21, with adjacent horizontally polarized radiating elements 21 spaced equidistantly. Thus, the vertically polarized first radiator 10 is a linear structure, which lacks a horizontal metal surface and therefore lacks a lateral surface current component, reducing the horizontal component of the electric field and significantly improving the isolation between the first radiator 10 and the second radiator 20.

[0021] Please refer to Figure 2 and Figure 3 The first radiator 10 includes an open-circuit conductor 11 and a grounding conductor 12; adjacent open-circuit conductors 11 are spaced at the same interval; adjacent grounding conductors 12 are spaced at the same interval.

[0022] The first radiator 10 includes open-circuit conductors 11 and grounding conductors 12; adjacent open-circuit conductors 11 are spaced at the same interval; adjacent grounding conductors 12 are spaced at the same interval. The number of open-circuit conductors 11 is the same as the number of grounding conductors 12; and the open-circuit conductors 11 and grounding conductors 12 are symmetrically arranged one-to-one through intersections. In this embodiment, there are three open-circuit conductors 11 and three grounding conductors 12.

[0023] The first radiator 10 has a frequency range of 700 MHz to 2700 MHz. The length and dimensions of the open-circuit conductor 11 are greater than those of the grounding conductor 12. The open-circuit conductor 11 can resonate at a lower operating frequency; the grounding conductor 12 can resonate at a higher operating frequency. That is, the resonant operating frequency of the grounding conductor 12 is higher than that of the open-circuit conductor 11. Furthermore, the open-circuit conductor 11 and the grounding conductor 12 each have the same 90-degree line segment perpendicular to the reflector 1 and line segments that intersect at the same angle to the reflector 1; the grounding conductor 12 also has a line segment parallel to the reflector 1, unlike the open-circuit conductor 11. Thus, the continuity of the resonant frequency of the first radiator 10 is achieved.

[0024] The reflector 1 is circular. Specifically, the intersection point of the first radiator 10 is collinear with the center point of the reflector 1. Thus, the first radiator 10 is positioned directly above the central region of the corresponding reflector 1.

[0025] The coaxial cable 50 includes a first cable 51 and a second cable 52 arranged in parallel. The first cable 51 passes through the center point of the reflector 1 and connects to the intersection point with the first radiator 10, thereby feeding power to the first radiator 10.

[0026] Furthermore, the second radiator 20 includes a plurality of dielectric plates 25 perpendicular to the reflector 1. Horizontally polarized radiating elements 21 are disposed on the surface of the dielectric plates 25 parallel to the reflector 1.

[0027] Furthermore, the dual-polarized omnidirectional ceiling antenna 100 also includes a feed line 6 and a power supply element 8 disposed on the dielectric substrate 25. The power supply element 8 is connected to the horizontally polarized radiating element 21. One end of the feed line 6 is connected to the second cable 52; the other end of the feed line 6 is connected to several power supply elements 8 respectively. In this way, the second radiator 20 is fed.

[0028] Preferably, the power supply element 8 is disposed on one of the sides of the dielectric plate 25 perpendicular to the reflector plate 1.

[0029] In this embodiment, the number of horizontally polarized radiating elements 21 is equal to the number of open-circuit wires 11. The second radiator 20 is a high-frequency oscillator; it is disposed on the outer periphery of the first reflector. Specifically, the horizontal polarization frequency range of the horizontally polarized radiating elements 21 is 1710 MHz to 2700 MHz. Each horizontally polarized radiating element 21 is disposed in a one-to-one correspondence with an open-circuit wire 11.

[0030] In this embodiment, the wires of the first radiator 10 are all copper conductors. That is, both the open-circuit conductor 11 and the grounding conductor 12 are copper. The reflector 1 is a double-sided dielectric plate. The coaxial cable 50 is model RFG58.

[0031] The dual-polarized omnidirectional ceiling antenna of this application embodiment has a vertically polarized first radiator 10 and a horizontally polarized second radiator 20; the vertically polarized first radiator 10 has a linear structure, and its electric field has a reduced horizontal component, which can significantly improve the isolation between the first radiator 10 and the second radiator 20.

[0032] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the concept of the technical solution of the present invention, should be included within the scope of protection of the present invention.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A dual-polarized omnidirectional ceiling antenna, comprising a reflector, a first radiator and a second radiator disposed above the reflector, and a coaxial cable passing through the reflector from below and connecting to the first radiator and the second radiator respectively; characterized in that, The first radiator is a vertically polarized linear structure radiator composed of multiple intersecting wires; the second radiator has several horizontally polarized radiating elements, with adjacent horizontally polarized radiating elements spaced at the same interval. The first radiator includes an open-circuit conductor and a grounding conductor, with adjacent open-circuit conductors having the same spacing and adjacent grounding conductors having the same spacing. The number of open-circuit conductors is the same as the number of grounding conductors; the open-circuit conductors and grounding conductors are symmetrically arranged at their intersections. The length and dimensions of the open-circuit conductor are greater than the length and dimensions of the grounding conductor.

2. The dual-polarized omnidirectional ceiling-mounted antenna according to claim 1, characterized in that, The reflector is circular, and the intersection of the linear structure is collinear with the center point of the reflector; the coaxial cable includes a first cable and a second cable arranged in parallel; the first cable passes through the center point of the reflector and connects to the intersection of the linear structure.

3. The dual-polarized omnidirectional ceiling-mounted antenna according to claim 2, characterized in that, The second radiator includes a plurality of dielectric plates perpendicular to the reflector; the horizontally polarized radiating element is disposed on the surface of the double-sided dielectric plate parallel to the reflector.

4. The dual-polarized omnidirectional ceiling-mounted antenna according to claim 3, characterized in that, It also includes a feed line and a power supply component disposed on the dielectric plate, the power supply component being connected to a horizontally polarized radiating component; one end of the feed line is connected to a second cable, and the other end is connected to several power supply components respectively.

5. The dual-polarized omnidirectional ceiling-mounted antenna according to claim 4, characterized in that, The power supply component is disposed on one of the sides of the dielectric plate perpendicular to the reflector.

6. The dual-polarized omnidirectional ceiling-mounted antenna according to claim 1, characterized in that, The number of horizontally polarized radiating elements is equal to the number of open-circuit conductors; the second radiator is a high-frequency oscillator; and they are respectively disposed on the outer periphery of the first reflector.

7. The dual-polarized omnidirectional ceiling-mounted antenna according to claim 1, characterized in that, The wire is a copper conductor; the reflector is a double-sided dielectric plate.

8. The dual-polarized omnidirectional ceiling-mounted antenna according to claim 1, characterized in that, The coaxial cable is model RFG58.

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